There is an Uchtred Knox who in 1474 "resigned the lands of Knox, Ranfurley and Griff Castle to the crown in return for a new grant of the same (the charter still being extant in the Registery Office of the Great Seal in Edinburgh)". His father was John Knox. He married Agnes and had a son of the same name who succeeded him. His son married a Janet, daughter of Lord Semple and had at least two sons. 
This Uchter was also one of the arbiters who determined the boundary of the lands of the convent at Paisley in 1489.
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On 28 Jan 2016 at 22:28 GMT Robin Lee wrote:
Uchtred is 22 degrees from SJ Baty, 23 degrees from Orville Redenbacher and 15 degrees from Victoria of the United Kingdom of Great Britain and Ireland on our single family tree. Login to find your connection.